:root {
  color: #333;
  --color-main: #f47216;
  --color-operation: #4365ef;
  font-size: 14px;
  color: #333;
}

* {
  box-sizing: border-box;
}

body,
h1,
p {
  padding: 0;
  margin: 0;
}

ul {
  list-style: none;
  margin: 0;
  padding: 0;
}
